426151661 has 4 divisors (see below), whose sum is σ = 458932572. Its totient is φ = 393370752.

The previous prime is 426151643. The next prime is 426151667. The reversal of 426151661 is 166151624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 271920100 + 154231561 = 16490^2 + 12419^2 .

It is a cyclic number.

It is not a de Polignac number, because 426151661 - 2²⁶ = 359042797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426151667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16390436 + ... + 16390461.

It is an arithmetic number, because the mean of its divisors is an integer number (114733143).

Almost surely, 2^426151661 is an apocalyptic number.

It is an amenable number.

426151661 is a deficient number, since it is larger than the sum of its proper divisors (32780911).

426151661 is a wasteful number, since it uses less digits than its factorization.

426151661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32780910.

The product of its digits is 8640, while the sum is 32.

The square root of 426151661 is about 20643.4411133415. The cubic root of 426151661 is about 752.5258018474.

The spelling of 426151661 in words is "four hundred twenty-six million, one hundred fifty-one thousand, six hundred sixty-one".